1. When you play a character, you should always use the role card that comes from the same adventure path. So if you are playing RotR Sajan, you need to use RotR Sajan's role card. If you play RotR Lini, you need to use RotR Lini's role card.
2. I think RotR Sajan would be pretty good in S&S. His Constitution, Fortitude and decent Wisdom I would be tempted to go with Drunken Master to see what he could do with those Liquid trait cards.
3. Not off the top of my head.
What could be more piratey than stumbling out of your captain's quarters reeking of rum and punching everything in sight?
Actual ideas though: For Drunken Master, you could find a way to grant Swashbuckling so he punches pirate-style, perhaps tacking a checkbox to the combat blessings power. "If you do, add the Swashbuckling trait." You'd have to remove another checkbox to balance that on principle, though it doesn't seem that overpowered to get that trait only on combat checks and only ones you're already committing blessings to.
For Zen Archer, you could maybe turn that into Zen Gunner, changing "When you play a weapon with the Ranged trait, you may recharge it instead of discarding it." to something gun related, like "When you bury a weapon with the Firearm trait for its power, you may recharge a card from your discard pile." That would keep the intent of not being hurt when you use a big weapon power, while not making guns overpowered since you still bury them away as written.
Neither of these are needed changes to viably play Sajan in S&S of course, just ideas for edits since you asked.
What about a Zen Gunslinger Role? Maybe let him discard firearms instead of burying them.
